How I do it on my 305 would probably work on your 330. I have a bridle for the front of the dingy and use a multi-colored tow line made for a towing a tube. For short distances at slow speeds I usually just cleat it off to one of the stern cleats. For longer distances at higher speeds I will run a dock line in between the 2 stern cleats and put that through the loop in the tow line. The dingy will usually want to center itself in the flat part of the wake behind the boat. I have done this both with a 305 and 265. If you'r wondering about towing a couple of kids in a towable inflatable, I cannot help you as I have never done that off the grady.
Very helpful. Thank you. I plan only to tow the inflatable for transportation to/from a mooring or anchorage.
I plan to empty the inflatable as I tow but what is your opinion on the outboard? Up or down? I have a 9.9hp through bolted and a hard bottom on the dingy.
My hard bottom inflatable I will tilt the engine up(15hp). That being said a couple of time we got hit with a big wake and the engine dropped. Didn't make a big difference. If I'm towing the hard bottom its usually just to a local island a couple miles away and at slow speeds.
With a soft bottom roll up inflatable i have done a few longer runs (13-15 mi) at slow cruise speed mid 20's. I took the engine off and the dingy tracked well behind the boat.
Always tow with the motor up... or take it off.
I once lost a borrowed dinghy motor which apparently wasn't tightened down well enough. We watched as the safety tether frayed one strand at a time like in a cartoon, as we were pulling the dinghy in. Several hundred dollar lesson.
Regards, Mike